ruby_mem_test.py revision 8437:94c7423ecd87
1# Copyright (c) 2006-2007 The Regents of The University of Michigan 2# Copyright (c) 2009 Advanced Micro Devices, Inc. 3# All rights reserved. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions are 7# met: redistributions of source code must retain the above copyright 8# notice, this list of conditions and the following disclaimer; 9# redistributions in binary form must reproduce the above copyright 10# notice, this list of conditions and the following disclaimer in the 11# documentation and/or other materials provided with the distribution; 12# neither the name of the copyright holders nor the names of its 13# contributors may be used to endorse or promote products derived from 14# this software without specific prior written permission. 15# 16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27# 28# Authors: Ron Dreslinski 29# Brad Beckmann 30 31import m5 32from m5.objects import * 33from m5.defines import buildEnv 34from m5.util import addToPath 35import os, optparse, sys 36addToPath('../common') 37addToPath('../ruby') 38 39import Ruby 40 41if buildEnv['FULL_SYSTEM']: 42 panic("This script requires system-emulation mode (*_SE).") 43 44# Get paths we might need. It's expected this file is in m5/configs/example. 45config_path = os.path.dirname(os.path.abspath(__file__)) 46config_root = os.path.dirname(config_path) 47m5_root = os.path.dirname(config_root) 48 49parser = optparse.OptionParser() 50 51parser.add_option("-l", "--maxloads", metavar="N", default=0, 52 help="Stop after N loads") 53parser.add_option("--progress", type="int", default=1000, 54 metavar="NLOADS", 55 help="Progress message interval " 56 "[default: %default]") 57parser.add_option("--num-dmas", type="int", default=0, help="# of dma testers") 58parser.add_option("--functional", type="int", default=0, 59 help="percentage of accesses that should be functional") 60parser.add_option("--suppress-func-warnings", action="store_true", 61 help="suppress warnings when functional accesses fail") 62 63# 64# Add the ruby specific and protocol specific options 65# 66Ruby.define_options(parser) 67 68execfile(os.path.join(config_root, "common", "Options.py")) 69 70(options, args) = parser.parse_args() 71 72# 73# Set the default cache size and associativity to be very small to encourage 74# races between requests and writebacks. 75# 76options.l1d_size="256B" 77options.l1i_size="256B" 78options.l2_size="512B" 79options.l3_size="1kB" 80options.l1d_assoc=2 81options.l1i_assoc=2 82options.l2_assoc=2 83options.l3_assoc=2 84 85if args: 86 print "Error: script doesn't take any positional arguments" 87 sys.exit(1) 88 89block_size = 64 90 91if options.num_cpus > block_size: 92 print "Error: Number of testers %d limited to %d because of false sharing" \ 93 % (options.num_cpus, block_size) 94 sys.exit(1) 95 96# 97# Currently ruby does not support atomic or uncacheable accesses 98# 99cpus = [ MemTest(atomic = False, 100 max_loads = options.maxloads, 101 issue_dmas = False, 102 percent_functional = options.functional, 103 percent_uncacheable = 0, 104 progress_interval = options.progress, 105 suppress_func_warnings = options.suppress_func_warnings) \ 106 for i in xrange(options.num_cpus) ] 107 108system = System(cpu = cpus, 109 funcmem = PhysicalMemory(), 110 physmem = PhysicalMemory()) 111 112if options.num_dmas > 0: 113 dmas = [ MemTest(atomic = False, 114 max_loads = options.maxloads, 115 issue_dmas = True, 116 percent_functional = 0, 117 percent_uncacheable = 0, 118 progress_interval = options.progress, 119 warn_on_failure = options.warn_on_failure) \ 120 for i in xrange(options.num_dmas) ] 121 system.dma_devices = dmas 122else: 123 dmas = [] 124 125Ruby.create_system(options, system, dma_devices = dmas) 126 127# 128# The tester is most effective when randomization is turned on and 129# artifical delay is randomly inserted on messages 130# 131system.ruby.randomization = True 132 133assert(len(cpus) == len(system.ruby._cpu_ruby_ports)) 134 135for (i, cpu) in enumerate(cpus): 136 # 137 # Tie the cpu memtester ports to the correct system ports 138 # 139 cpu.test = system.ruby._cpu_ruby_ports[i].port 140 cpu.functional = system.funcmem.port 141 142 # 143 # Since the memtester is incredibly bursty, increase the deadlock 144 # threshold to 5 million cycles 145 # 146 system.ruby._cpu_ruby_ports[i].deadlock_threshold = 5000000 147 148 # 149 # Ruby doesn't need the backing image of memory when running with 150 # the tester. 151 # 152 system.ruby._cpu_ruby_ports[i].access_phys_mem = False 153 154for (i, dma) in enumerate(dmas): 155 # 156 # Tie the dma memtester ports to the correct functional port 157 # Note that the test port has already been connected to the dma_sequencer 158 # 159 dma.functional = system.funcmem.port 160 161# ----------------------- 162# run simulation 163# ----------------------- 164 165root = Root( system = system ) 166root.system.mem_mode = 'timing' 167 168# Not much point in this being higher than the L1 latency 169m5.ticks.setGlobalFrequency('1ns') 170 171# instantiate configuration 172m5.instantiate() 173 174# simulate until program terminates 175exit_event = m5.simulate(options.maxtick) 176 177print 'Exiting @ tick', m5.curTick(), 'because', exit_event.getCause() 178